A homologous chromosome pair is best described as two chromosomes having.

A homologous chromosome pair can be regarded as two chromosomes that posses same genes which are arranged in the same order however there could be different alleles of some of the genes.

Therefore, Homologous chromosomes are

two chromosomes .

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the same genes in the same order but possibly with different alleles of some of the genes

Explanation:

Homologs are same genes in same order. So each loci in a chromosome (location of a gene) will have same gene, but those genes might be different allele. One of the homologous chromosome could have "A" allele and other could have "a" allele but both would be for same gene.

covalent bonding is a form of chemical bonding between two non metallic atoms which is characterized by the sharing of pairs of electrons between atoms and other covalent bonds.

the correct answer is:

a population changes in response to a change in the environment.